Capital adequacy (Tables)
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12 Months Ended |
Dec. 31, 2025 |
| Capital adequacy [Abstract] |
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| Schedule of capital adequacy |
Capital Adequacy Analysis | | | | | | | | | | December 31, 2025 | December 31, 2024 | Capital ratios | percent1 | percent1 | | Common Equity Tier 1 capital ratio | 23.1 | 22.2 | | Tier 1 capital ratio | 23.1 | 22.2 | | Total capital ratio | 23.1 | 22.2 | 1 Capital ratios exclusive of buffer requirements are the quotients of the relevant capital measure and the total risk exposure amount. See tables Own funds – adjusting items and Minimum capital requirements exclusive of buffers. |
| | | | | | | | | | | | | | | | December 31, 2025 | December 31, 2024 | | Total risk-based capital requirement | Skr mn | percent1 | Skr mn | percent1 | Capital base requirement of 8 percent2 | 7,993 | 8.0 | 8,437 | 8.0 | | of which Tier 1 requirement of 6 percent | 5,995 | 6.0 | 6,328 | 6.0 | | of which minimum requirement of 4.5 percent | 4,496 | 4.5 | 4,746 | 4.5 | Pillar 2 capital requirements3 | 3,007 | 3.0 | 3,871 | 3.7 | Common Equity Tier 1 capital available to meet buffer requirements4 | 12,123 | 12.1 | 11,106 | 10.5 | | Capital buffer requirements | 4,072 | 4.1 | 4,317 | 4.1 | | of which Capital conservation buffer | 2,498 | 2.5 | 2,637 | 2.5 | | of which Countercyclical buffer | 1,574 | 1.6 | 1,680 | 1.6 | Pillar 2 guidance5 | 999 | 1.0 | 1,582 | 1.5 | | Total risk-based capital requirement including Pillar 2 guidance | 16,071 | 16.1 | 18,207 | 17.3 | 1 Expressed as a percentage of total risk exposure amount. | 2 The minimum requirements according to CRR (Regulation (EU) No 575/2013 of the European Parliament and of the Council of June 26, 2013 on prudential requirements for credit institutions and investment firm). | 3 Individual Pillar 2 requirement of 3.01 percent calculated on the total risk exposure amount, according to the decision from the latest Swedish FSA SREP. | 4 Common Equity Tier 1 capital available to meet buffer requirement after 8 percent minimum capital requirement (SEK covers all minimum requirements with CET1 capital, that is 4.5 percent, 1.5 percent and 2 percent) and after the Pillar 2 requirements (3.01 percent). | 5 On September 30, 2025, the Swedish FSA notified SEK, within the latest SREP, that in addition to the capital requirements according to Regulation (EU) no 575/2013 on prudential requirements, SEK should hold additional capital (Pillar 2 guidance) of 1.00 percent of the total risk-weighted exposure amount. The Pillar 2 guidance is not a binding requirement. |
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| Schedule of leverage ratio |
| | | | | | | | | | December 31, 2025 | December 31, 2024 | Leverage ratio1 | Skr mn | Skr mn | | On-balance exposures | 236,953 | 234,139 | | Off-balance exposures | 7,161 | 8,775 | | Total exposure measure | 244,114 | 242,914 | Leverage ratio2 | 9.5% | 9.6% | 1 The leverage ratio reflects the full impact of IFRS 9 as no transitional rules were utilized. 2 Defined by CRR as the quotient of the Tier 1 capital and an exposure measure. |
| | | | | | | | | | | | | | | | December 31, 2025 | December 31, 2024 | | Total Leverage ratio requirement | Skr mn | percent1 | Skr mn | percent1 | Capital base requirement of 3 percent | 7,323 | 3.0 | 7,288 | 3.0 | Pillar 2 guidance2 | 366 | 0.2 | 365 | 0.2 | | Total capital requirement relating to Leverage ratio including Pillar 2 guidance | 7,689 | 3.2 | 7,653 | 3.2 | 1 Expressed as a percentage of total exposure amount. | 2 On September 30, 2025, the Swedish FSA notified SEK, within the latest SREP, that SEK should hold additional capital (Pillar 2 guidance) of 0.15 percent calculated on the total leverage ratio exposure measure. The Pillar 2 guidance is not a binding requirement. |
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| Schedule of own funds |
Own funds — adjusting items | | | | | | | | | | Parent Company | | Skr mn | December 31, 2025 | December 31, 2024 | Share capital1 | 3,990 | 3,990 | | Retained earnings | 18,468 | 18,413 | | Accumulated other comprehensive income and other reserves | 456 | 241 | | Independently reviewed profit net of any foreseeable charge or dividend | 703 | 1,255 | | Common equity Tier 1 (CET1) capital before regulatory adjustments | 23,617 | 23,899 | | Additional value adjustments due to prudent valuations | -83 | -84 | | Intangible assets | -22 | -22 | | Fair value reserves related to gains or losses on cash flow hedges | — | 3 | | Gains or losses on liabilities valued at fair value resulting from changes in own credit standing | -229 | -217 | | IRB shortfall of credit risk adjustments to expected losses | -144 | -180 | | Insufficient coverage for non-performing exposures | -15 | -2 | | Total regulatory adjustments to Common Equity Tier 1 capital | -493 | -502 | | Total Common Equity Tier 1 capital | 23,124 | 23,397 | | Total own funds | 23,124 | 23,397 | 1 For a detailed description of the instruments constituting share capital, see Note 22. |
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| Schedule of minimum capital requirements exclusive of buffers |
Minimum capital requirements exclusive of buffers | | | | | | | | | | | | | | | | | | | | | | Parent Company | | December 31, 2025 | December 31, 2024 | | Skr mn | EAD1 | Risk exposure amount | Min. capital requirement | EAD1 | Risk exposure amount | Min. capital requirement | | Credit risk, standardized approach | | | | | | | | Corporates | 5,829 | 5,770 | 462 | 5,532 | 5,528 | 442 | | Equity exposures | — | — | — | 20 | 30 | 2 | | Default exposures | 0 | 0 | 0 | 6 | 6 | 1 | | Total credit risk, standardized approach | 5,829 | 5,770 | 462 | 5,558 | 5,564 | 445 | | Credit risk, IRB approach | | | | | | | | Central governments | 233,305 | 9,487 | 759 | 211,834 | 9,159 | 733 | Financial institutions2 | 32,236 | 6,493 | 519 | 34,067 | 6,153 | 492 | Corporates3 | 149,636 | 69,128 | 5,530 | 147,820 | 75,541 | 6,043 | | Non-credit-obligation assets | 201 | 201 | 16 | 213 | 213 | 17 | | Total credit risk, IRB approach | 415,378 | 85,310 | 6,825 | 393,934 | 91,066 | 7,285 | | Credit valuation adjustment risk | n.a. | 1,882 | 151 | n.a. | 1,936 | 154 | | Foreign exchange risk | n.a. | 2,494 | 200 | n.a. | 1,498 | 120 | | Commodity risk | n.a. | 4 | 0 | n.a. | 7 | 1 | | Operational risk | n.a. | 4,452 | 356 | n.a. | 5,395 | 432 | | Total | 421,207 | 99,912 | 7,994 | 399,492 | 105,465 | 8,437 | 1 Exposure at default (EAD) shows the size of the outstanding exposure at default. 2 Of which counterparty risk in derivative contracts: EAD Skr 5,145 million (year-end 2024: Skr 5,899 million), Risk exposure amount of Skr 1,059 million (year-end 2024: Skr 1,513 million) and Capital requirement of Skr 85 million (year-end 2024: Skr 121 million). 3 Of which related to Specialized lending: EAD Skr 8,258 million (year-end 2024 Skr 7,322 million), Risk exposure amount of Skr 8,473 million (year-end 2024: Skr 5,019 million) and Capital requirement of Skr 678 million (year-end 2024: Skr 402 million). |
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| Schedule of credit risk by PD grade |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | December 31, 2024 | | AAA to AA- | A+ to A- | BBB+ to BBB- | BB+ to B- | CCC to D | AAA to AA- | A+ to A- | BBB+ to BBB- | BB+ to B- | CCC to D | Skr mn | 0.003%-0.010% | 0.020%–0.060% | 0.100%–0.270% | 0.450%–7.690% | 38.280%–100.000% | 0.003%-0.010% | 0.020%–0.060% | 0.100%–0.270% | 0.450%–7.690% | 38.280%–100.000% | | Central governments | | | | | | | | | | | | EAD | 229,172 | 4,125 | — | 7 | — | 209,730 | 2,091 | — | 12 | — | | Average PD in % | 0.003 | 0.04 | — | 0.70 | — | 0.003 | 0.06 | — | 1.20 | 100.00 | | Average LGD in % | 45.0 | 45.0 | — | 45.0 | — | 45.0 | 45.0 | — | 45.0 | 45.0 | | Average risk weight in % | 3.8 | 16.4 | — | 82.5 | — | 4.1 | 22.8 | — | 105.2 | — |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | December 31, 2024 | | AAA to AA- | A+ to A- | BBB+ to BBB- | BB+ to B- | CCC to D | AAA to AA- | A+ to A- | BBB+ to BBB- | BB+ to B- | CCC to D | | Skr mn | 0.003%-0.032% | 0.050%–0.060% | 0.150%–0.350% | 0.500%–11.430% | 35.290%–100.000% | 0.010%-0.040% | 0.060%–0.110% | 0.160%–0.320% | 0.500%–8.270% | 28.910%–100.000% | | Financial institutions | | | | | | | | | | | | EAD | 17,093 | 11,298 | 873 | 22 | — | 14,245 | 18,777 | 995 | 50 | — | | Average PD in % | 0.03 | 0.05 | 0.35 | 0.79 | — | 0.03 | 0.05 | 0.33 | 1.18 | — | | Average LGD in % | 27.6 | 36.3 | 45.0 | 45.0 | — | 34.8 | 29.4 | 45.0 | 45.0 | — | | Average risk weight in % | 16.4 | 22.3 | 77.4 | 109.0 | — | 15.0 | 16.8 | 80.0 | 130.0 | — | | Corporates | | | | | | | | | | | | EAD | 6,143 | 24,362 | 78,997 | 30,530 | 1,345 | 4,423 | 27,693 | 75,379 | 32,193 | 809 | | Average PD in % | 0.03 | 0.06 | 0.21 | 0.86 | 61.10 | 0.03 | 0.06 | 0.21 | 0.81 | 45.50 | | Average LGD in % | 40.0 | 40.0 | 40.0 | 40.0 | 40.0 | 45.0 | 45.0 | 45.0 | 45.0 | 45.0 | | Average risk weight in % | 17.5 | 18.7 | 38.8 | 74.0 | 131.3 | 11.8 | 19.8 | 46.1 | 86.9 | 219.4 |
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| Schedule of liquidity coverage |
| | | | | | | | | | Skr bn, 12 month average | Dec 31, 2025 | Dec 31, 2024 | | Total liquid assets | 59.1 | 64.1 | Net liquidity outflows1 | 10.3 | 14.9 | | Liquidity outflows | 22.9 | 26.0 | | Liquidity inflows | 13.2 | 11.2 | | Liquidity Coverage Ratio | 660% | 518% | 1 Net liquidity outflows is calculated as the net of liquidity outflows and capped liquidity inflows. Capped liquidity inflows is calculated in accordance with article 425 of CRR (EU 575/2013) and article 33 of the Commission Delegated Regulation (EU) 2015/61. |
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| Schedule of net stable funding |
| | | | | | | | | | Skr bn | Dec 31, 2025 | Dec 31, 2024 | | Available stable funding | 244.3 | 272.5 | | Required stable funding | 202.8 | 211.0 | | Net Stable Funding Ratio | 120% | 129% |
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